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Trivalent Influenza Vaccine 1 SP Shz TIV1

Phase 3

Influenza | Vaccine | Infectious Disease |Sanofi|Trials Updated: Sep 16, 2025

Trivalent Influenza Vaccine 1 SP Shz TIV1 development status

Highest phase Phase 3
Registered trials 1 across 1 sponsor since Dec 2019

Success Probability

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Market & Valuation

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Trial Design

RandomizedDouble-BlindCONTROLLED
Total Trials1
Total Enrollment7,106

FDA Designations

No designations recorded

Trivalent Influenza Vaccine 1 SP Shz TIV1 clinical trials

Trivalent Influenza Vaccine 1 SP Shz TIV1 · 1 trial · 1 indication

Phase 3 1
NCT04210349Study of Shenzhen Quadrivalent Inactivated Influenza Vaccine Versus the Shenzhen Trivalent Inactivated Influenza Vaccine in Chinese Subjects From 6 Months of AgeInfluenza
COMPLETED7,106 Analytics
PHASE3COMPLETED
Study of Shenzhen Quadrivalent Inactivated Influenza Vaccine Versus the Shenzhen Trivalent Inactivated Influenza Vaccine in Chinese Subjects From 6 Months of Age
InfluenzaUnlock trial analytics

Study Endpoints

Primary Endpoints

Geometric Mean Titers of Influenza Antibodies for Subjects 6-35 months
28 days post-final vaccination

Geometric mean titers will be assessed by a hemagglutination (HAI) method

Participants Achieving Seroconversion Against Antigens for Subjects 6-35 months
28 days post-final vaccination

Influenza antibodies will be assessed using the HAI method.

Geometric Mean Titers of Antibodies for Subjects ≥ 3 years
Day 28

Geometric mean titers will be assessed by a HAI method

Number of Participants Achieving Seroconversion Against Antigens for Subjects ≥ 3 years
Day 28

Influenza antibodies will be assessed using the HAI method.

Number of Participants with Immediate Adverse Events
Within 30 minutes after vaccination

Immediate adverse events includes unsolicited systemic adverse events occuring within 30 minutes after vaccination

Number of Participants With Solicited Injection Site or Systemic Reactions
Within 7 days after vaccination

Injection site reactions: injection site tenderness/pain, erythema, swelling, induration, and ecchymosis. Systemic reactions: fever, vomiting, crying abnormal, drowsiness, appetite lost, and irritability for toddlers aged \<= 23 months and fever, headache, malaise, myalgia and shivering for participants aged \> 2 years.

Number of Participants with Unsolicited Adverse Events
Within 28 days after vaccination

Adverse events other than solicited reactions

Number of Participants with Serious Adverse Events
From Day 0 to Day 56 for participants in Group A and from Day 0 to 6 months after last vaccination for participants in Group 1 through Group 5.

Serious adverse events (including adverse event of special interest) are assessed throughout the study.

Secondary Endpoints

Geometric Mean Titers of Antibodies
Day 0 and 28 days post-final vaccination
Geometric Mean Individual Titer Ratio
Day 0 and 28 days post-final vaccination
Number of Participants with Detectable Titer ≥ 10 (1/dilution [1/dil])
Day 0 and 28 days post-final vaccination
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Study Design & Arms

AllocationRANDOMIZED
MaskingTRIPLE
ModelPARALLEL
PurposePREVENTION

Treatment Arms

ArmTypeDescription
Group A: 6 to 35 months, previously unvaccinated, step 1EXPERIMENTALParticipants will receive two injections of SP Shz QIV 0.5 mL at Day 0 and Day 28
Group 1: 6 to 35 months, step 2EXPERIMENTALParticipants will receive one injection of SP Shz QIV 0.25 mL or SP Shz QIV 0.5 mL at Day 0 or SP Shz TIV1 0.25 mL or SP Shz TIV2 0.25 mL at Day 0. Participants for whom 2 doses of influenza vaccine were recommended, a second dose was administered at Day 28.
Group 2: 3 to 8 years, step 2EXPERIMENTALParticipants will receive one injection of SP Shz QIV 0.5 mL or SP Shz QIV 0.5 mL or SP Shz TIV1 0.5 mL or SP Shz TIV2 0.5 mL at Day 0. Participants for whom 2 doses of influenza vaccine were recommended, a second dose was administered at Day 28.
Group 3: 9 to 17 years, step 2EXPERIMENTALParticipants will receive one injection of SP Shz QIV 0.5 mL or SP Shz TIV1 0.5 mL or SP Shz TIV2 0.5 mL at Day 0.
Group 4: 18 to 60 years, step 2EXPERIMENTALParticipants will receive one injection of SP Shz QIV 0.5 mL or SP Shz TIV1 0.5 mL or SP Shz TIV2 0.5 mL at Day 0.
Group 5: >=61 yearsEXPERIMENTALParticipants will receive one injection of SP Shz QIV 0.5 mL or SP Shz TIV1 0.5 mL or SP Shz TIV2 0.5 mL at Day 0.

Interventions

NameTypeDescription
Quadrivalent Influenza VaccineBIOLOGICALPharmaceutical form: Suspension for injection Route of administration: intramuscular
Trivalent Influenza Vaccine 1 SP Shz TIV1BIOLOGICALPharmaceutical form: Suspension for injection Route of administration: intramuscular
Trivalent Influenza Vaccine 2 SP Shz TIV2BIOLOGICALPharmaceutical form: Suspension for injection Route of administration: intramuscular
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Eligibility Criteria

Age Range6 Months to N/A
SexALL
Healthy VolunteersYes
Study Sites7

Inclusion criteria : * Aged ≥ 6 months on the day of the first study visit/inclusion * In good health or with underlying medical condition(s) that are judged to be stable by the investigator. Medically-stable is defined as: * No new diagnosis OR * No new class of prescription drug initiated du...

Countries:China
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Frequently asked questions about Trivalent Influenza Vaccine 1 SP Shz TIV1

What is Trivalent Influenza Vaccine 1 SP Shz TIV1?

Trivalent Influenza Vaccine 1 SP Shz TIV1 is an investigational vaccine developed by Sanofi for the prevention of influenza. It is a trivalent inactivated influenza vaccine candidate that has been studied in a Phase 3 clinical trial conducted in China in subjects from 6 months of age.

What is Trivalent Influenza Vaccine 1 SP Shz TIV1 used for?

Trivalent Influenza Vaccine 1 SP Shz TIV1 is being developed for the prevention of influenza, an infectious disease. Its clinical program has focused on immunization of healthy volunteers, including young children from 6 months of age, against seasonal influenza.

Who makes Trivalent Influenza Vaccine 1 SP Shz TIV1?

Trivalent Influenza Vaccine 1 SP Shz TIV1 is developed by Sanofi, which trades under the ticker SNY. Sanofi is the sponsor of the clinical program evaluating this trivalent inactivated influenza vaccine candidate.

What phase is Trivalent Influenza Vaccine 1 SP Shz TIV1 in?

Trivalent Influenza Vaccine 1 SP Shz TIV1 is in Phase 3 development. It is an investigational vaccine candidate and is not described as approved. The Phase 3 trial evaluating it has been completed, and no trials for this candidate are currently listed as active.

What clinical trials is Trivalent Influenza Vaccine 1 SP Shz TIV1 in?

Trivalent Influenza Vaccine 1 SP Shz TIV1 was evaluated in the Phase 3 trial NCT04210349, titled Study of Shenzhen Quadrivalent Inactivated Influenza Vaccine Versus the Shenzhen Trivalent Inactivated Influenza Vaccine in Chinese Subjects From 6 Months of Age. The trial enrolled 7,106 participants in China and has been completed.

How was the Phase 3 trial of Trivalent Influenza Vaccine 1 SP Shz TIV1 designed?

The Phase 3 trial NCT04210349 was a randomized, double-blind, controlled study of Trivalent Influenza Vaccine 1 SP Shz TIV1 in Chinese subjects from 6 months of age. It enrolled 7,106 healthy volunteers of all sexes and compared the trivalent inactivated influenza vaccine against a quadrivalent inactivated influenza vaccine.